Rygreen93 had his 118TSI done by Harding recently and although he wasn't running a Stage 1 map before that he was very pleased. I've heard good things. Guy wouldn't sell it if he didn't think it was better than the APR he sold before.
I don't have the VWR CAI so can't comment on that but if you're going to have a VWR theme it will bug you each time you open your bonnet if you don't get it. They come up for sale in the UK forums from time to time.
I've got the Racingline sport springs and I'm very happy. Comfy enough around town and a nice constant spring rate on cornering. I'd be looking at the HP sways before the VWR springs if you haven't already. Your Rocco is probably low enough already and the sway bars make much more of a performance difference IMO.
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